This specimen is made by bulky pyrite that is partially crystallized on a face.
Its surface is covered by big, dark and partially brilliant crystals of Tetrahedrite, whose shape is used to get the name at this specie.Specimen weight:420 gr.Crystal size:mm. 32 Overall size:100mm x 50 mm x 45 mm

Five semitransparent 'japan-law' twinned quartzes are visible over this cluster.
The lightly frosted, flattened twins has sharp beveled edges and seems like a butterfly.
They are in good evidence among some classic crystallized crystals of quartz.Specimen weight:320 gr.Crystal size:mm. 28 Overall size:97mm x 55 mm x 52 mm

A big twinned crystal of tetrahedrite is in good evidence over the matrix.
Some other smaller tetrahedrites and some hyalin quartzes are spread over the surface.Specimen weight:92 gr.Crystal size:mm. 26 Overall size:55mm x 32 mm x 28 mm

In the front there are some black, brilliant and good terminated crystals of hubnerite. In the back they are partially coverd by litlle hyaline quartzes.Specimen weight:96 gr.Crystal size:mm. 57 Overall size:46mm x 26 mm x 57 mm